DENVER — The Rockies will receive reinforcements Tuesday as they attempt to snap their five-game losing streak and return to the top of the wild-card berth. Sources confirmed Monday night that first baseman/pinch-hitter Jason Giambi, relievers Joel Peralta and Randy Flores and catcher Paul Phillips will be called up tomorrow when rosters expand to 40. There might be more down the line, namely pitcher Russ Ortiz, but these are the initial and perhaps final wave.

Giambi is expected to join the team. Giambi has gotten his timing back in Triple-A, slugging a pair of home runs. He will provide another left-handed bat off the bench, freeing manager Jim Tracy to use Seth Smith earlier in games if necessary.

Peralta, the team’s primary setupman for two months, and Flores, a situational lefty, can help a bullpen that sprung a leak on Sunday. Phillips drew the praise of manager Jim Tracy during a call-up in late June. He hit well, and worked well with the pitching staff. The Rockies also continue to monitor the pitching work of Ortiz in Triple-A. As they search for a pitcher, they have inquired about Arizona’s Jon Garland, but there would be some serious financial hurdles to clear given the money remaining on Garland’s contract and his buyout. He has $1.3 million remaining on his deal, plus either a $2.5 million buyout if the club declines his $10 million 2010 option or a $1 million buyout if the player declines it.